Devonian
Geologic period
The Devonian is a geologic period and system of the Paleozoic era during the Phanerozoic eon, spanning 60.3 million years from the end of the preceding Silurian period at 419.2 million years ago, to the beginning of the succeeding Carboniferous... Wikipedia
Nickname(s): Age of Fishes
Era: Paleozoic
Occurred: 419.2 (+/- 3.2) million years ago - 358.9 (+/- 0.4) million years ago
Epochs: Early Devonian, Middle Devonian, and Upper Devonian
Water temperature: 80 to 85 degrees Fahrenheit
Chronological unit: Period
Lower boundary definition: FAD of the Graptolite Monograptus uniformis